SpringMVC案例3----spring3.0项目拦截器、ajax、文件上传应用

2023-08-20 16:13:04

依然是项目结构图和所需jar包图：

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显示配置文件hib-config.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

	xmlns:aop="http://www.springframework.org/schema/aop"

	xmlns:tx="http://www.springframework.org/schema/tx"

	xmlns:context="http://www.springframework.org/schema/context"

	xsi:schemaLocation="

http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx-3.0.xsd

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-aop-3.0.xsd

  http://www.springframework.org/schema/context

   http://www.springframework.org/schema/context/spring-context-3.0.xsd

">

<context:component-scan base-package="com.sxt"></context:component-scan>

<!-- 支持aop注解 -->

<aop:aspectj-autoproxy></aop:aspectj-autoproxy>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">

	<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>

	<property name="url" value="jdbc:mysql://localhost:3306/crud"></property>

	<property name="username" value="root"></property>

	<property name="password" value="root"></property>

</bean>

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">

	<property name="dataSource">

		<ref bean="dataSource"></ref>

	</property>

	<property name="hibernateProperties">

		<props>

			<prop key="hibernate.dialect">

				org.hibernate.dialect.MySQLDialect

			</prop>

			<prop key="hibernate.show_sql">

				true

			</prop>

			<prop key="hibernate.hbm2ddl.auto">update</prop>

		</props>

	</property>

	<property name="packagesToScan">

		<value>com.sxt.po</value>

	</property>

</bean>

<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">

	<property name="sessionFactory" ref="sessionFactory"></property>

</bean>

<!-- 配置一个JdbcTemplate实例 -->

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">

	<property name="dataSource" ref="dataSource"></property>

</bean>

<!-- 配置事务管理 -->

<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">

	<property name="sessionFactory" ref="sessionFactory"></property>

</bean>

<tx:annotation-driven transaction-manager="txManager"/>

<aop:config>

	<aop:pointcut expression="execution(public * com.sxt.service.impl.*.*(..))" id="businessService"/>

	<aop:advisor advice-ref="txAdvice" pointcut-ref="businessService"/>

</aop:config>

<tx:advice id="txAdvice" transaction-manager="txManager">

	<tx:attributes>

		<tx:method name="find*" read-only="true" propagation="NOT_SUPPORTED"/>

		<!-- get开头的方法不须要在事务中执行。有些情况是没有必要使用事务的。比方获取数据。开启事务本身对性能本身是有一定的影响的 -->

		<tx:method name="*"/>

	</tx:attributes>

</tx:advice>

</beans>

再是springmvc-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xmlns:p="http://www.springframework.org/schema/p"

    xmlns:mvc="http://www.springframework.org/schema/mvc"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:util="http://www.springframework.org/schema/util"

    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd

            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd

            http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd">

    <!-- 対web包中的全部的类进行扫描，以完毕bean的创建和自己主动依赖输入功能 -->

    <context:component-scan base-package="com.sxt"></context:component-scan>

    <!-- 启动springmvc的注解功能，完毕请求和注解POJO的映射 -->

    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">

    	<property name="cacheSeconds" value="0"></property>

    	<property name="messageConverters">

    		<list>

    			<bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">

    			</bean>

    		</list>

    	</property>

    </bean>

    <!-- 对模型视图名称的解析，即在模型视图名称加入前后缀 -->

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" >

    	<property name="suffix" value=".jsp"></property>

    	<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />

    </bean>

    <!-- 处理文件上传 -->

    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

    	<!-- 默认编码 -->

    	<property name="defaultEncoding" value="utf-8"></property>

    	<property name="maxInMemorySize" value="10240"/><!-- 最大内存大小 -->

    	<!-- 上传后的文件夹名 -->

    	<property name="uploadTempDir" value="/upload/"></property>

    	<!-- 最大文件大小，-1为无限制 -->

    	<property name="maxUploadSize" value="-1"></property>

    </bean>

    <mvc:interceptors>

    	<!-- 拦截全部springmvc的url -->

    	<bean class="com.sxt.interceptor.MyInterceptor"></bean>

    	<mvc:interceptor>

    		<mvc:mapping path="/user.do"/>

    		<bean class="com.sxt.interceptor.MyInterceptor2"></bean>

    	</mvc:interceptor>

    </mvc:interceptors>

</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.5"

	xmlns="http://java.sun.com/xml/ns/javaee"

	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

	<servlet>

		<servlet-name>springmvc</servlet-name>

		<servlet-class>

			org.springframework.web.servlet.DispatcherServlet

		</servlet-class>

		<init-param>

			<param-name>contextConfigLocation</param-name>

			<param-value>

				/WEB-INF/hib-config.xml,/WEB-INF/springmvc-servlet.xml

			</param-value>

		</init-param>

		<load-on-startup>1</load-on-startup>

	</servlet>

	<servlet-mapping>

		<servlet-name>springmvc</servlet-name>

		<url-pattern>*.do</url-pattern>

	</servlet-mapping>

</web-app>

dao层的userDao

package com.sxt.dao;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.orm.hibernate3.HibernateTemplate;

import org.springframework.stereotype.Component;

import org.springframework.stereotype.Repository;

import com.sxt.po.User;

@Repository("userDao")

public class UserDao {

	@Autowired

	private HibernateTemplate hibernateTemplate ;

	public void add(User u){

		System.out.println("userDao.add()");

		hibernateTemplate.save(u) ;

	}

}

模型层的user类

package com.sxt.po;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

@Entity

public class User {

	private int id ;

	private String name ;

	private String pwd ;

	public User(){}

	public User(String name,String pwd){

		this.name = name ;

		this.pwd = pwd ;

	}

	@Id

	@GeneratedValue(strategy=GenerationType.AUTO)

	public int getId() {

		return id;

	}

	public void setId(int id) {

		this.id = id;

	}

	public String getName() {

		return name;

	}

	public void setName(String name) {

		this.name = name;

	}

	public String getPwd() {

		return pwd;

	}

	public void setPwd(String pwd) {

		this.pwd = pwd;

	}

}

service层的userService类

package com.sxt.service;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import com.sxt.dao.UserDao;

import com.sxt.po.User;

@Service("userService")

public class UserService {

	@Autowired

	private UserDao userDao ;

	public void add(String name){

		System.out.println("UserService.add()");

		User u = new User() ;

		u.setName(name) ;

		userDao.add(u) ;

	}

}

controller层的userController类

package com.sxt.action;

import javax.annotation.Resource;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.ui.ModelMap;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.SessionAttributes;

import com.sxt.service.UserService;

@org.springframework.stereotype.Controller("userController")

@RequestMapping("/user.do")

@SessionAttributes({"uname"})

public class UserController{

	@Autowired

	private UserService userService ;

	@RequestMapping(params="method=reg")

	public String reg(String uname){

		System.out.println("UserController.reg()");

		userService.add(uname) ;

		return "index" ;

	}

	@RequestMapping(params="method=reg2")

	public String reg2(@RequestParam("uname")String name,ModelMap map){

		System.out.println("UserController.reg2()");

		userService.add(name) ;

		map.put("b", "bbb") ;

		return "index" ;

	}

	@RequestMapping(params="method=reg3")

	public String reg3(String uname,ModelMap map){

		System.out.println("UserController.reg3()");

		userService.add(uname) ;

		System.out.println(uname);

		map.put("uname", uname) ;

		return "index" ;

	}

	@RequestMapping(params="method=reg4")

	public String reg4(String uname,ModelMap map){

		System.out.println("UserController.reg4()");

//		return "forward:user.do?

method=reg3" ;    //转发，不写默认就是转发

		return "redirect:http://www.baidu.com" ;//重定向

	}

	@RequestMapping(params="method=reg5")

	public String reg5(String uname){

		System.out.println("UserController.reg4()");

		return "redirect:http://www.baidu.com" ;//重定向

	}

}

MyAjaxController类

package com.sxt.action;

import java.io.UnsupportedEncodingException;

import java.util.ArrayList;

import java.util.List;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.ResponseBody;

import com.sxt.po.User;

@Controller

@RequestMapping("myajax.do")

public class MyAjaxController {

	@RequestMapping(params="method=test2",method=RequestMethod.GET)

	public @ResponseBody List<User> test1(String uname) throws Exception{

		String uname2 = new String(uname.getBytes("iso8859-1"),"utf-8") ;

		System.out.println(uname2);

		System.out.println("MyAjaxController.test1()");

		List<User> list = new ArrayList<User>() ;

		list.add(new User("吴海旭","123")) ;

		list.add(new User("韩敬琼","456")) ;

		System.out.println(list.size());

		return list ;

	}

}

FileUoLoadController类

package com.sxt.action;

import java.io.File;

import java.util.Date;

import javax.servlet.ServletContext;

import org.apache.log4j.chainsaw.Main;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.context.ServletContextAware;

import org.springframework.web.multipart.commons.CommonsMultipartFile;

@Controller("fileUpLoadController")

public class FileUpLoadController implements ServletContextAware{

	private ServletContext servletContext ;

	@Override

	public void setServletContext(ServletContext servletContext) {

		// TODO Auto-generated method stub

		this.servletContext = servletContext ;

	}

	@RequestMapping(value="/upload.do",method=RequestMethod.POST)

	public String handleUploadData(String name,@RequestParam("file")CommonsMultipartFile file){

		if(!file.isEmpty()){

			//获取本地存储路径，必须在项目下建立一个这种路径

			String path = this.servletContext.getRealPath("/upload/") ;

			System.out.println(path);

			//获取文件名

			String fileName = file.getOriginalFilename() ;

			//获取文件后缀名

			String fileType = fileName.substring(fileName.lastIndexOf(".")) ;

			System.out.println(fileType);

			File file2 = new File(path,new Date().getTime()+fileType) ;

			try {

				file.getFileItem().write(file2) ;

			} catch (Exception e) {

				// TODO Auto-generated catch block

				e.printStackTrace();

			}

			return "redirect:upload_ok.jsp" ;

		}else{

			return "redirect:upload_error.jsp" ;

		}

	}

}

拦截器层的MyInterceptor类

package com.sxt.interceptor;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;

import org.springframework.web.servlet.ModelAndView;

public class MyInterceptor implements HandlerInterceptor{

	@Override

	public void afterCompletion(HttpServletRequest arg0,

			HttpServletResponse arg1, Object arg2, Exception arg3)

			throws Exception {

		// TODO Auto-generated method stub

		System.out.println("最后运行，一般用于释放资源！！！");

	}

	@Override

	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,

			Object arg2, ModelAndView arg3) throws Exception {

		// TODO Auto-generated method stub

		System.out.println("action运行之后，生成视图之前！。");

	}

	@Override

	public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,

			Object arg2) throws Exception {

		// TODO Auto-generated method stub

		System.out.println("action之前运行");

		return true;

	}

}

MyInterceptor2类

package com.sxt.interceptor;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

public class MyInterceptor2 extends HandlerInterceptorAdapter{

	@Override

	public boolean preHandle(HttpServletRequest request,

			HttpServletResponse response, Object handler) throws Exception {

		// TODO Auto-generated method stub

		System.out.println("MyInterceptor2.preHandle()");

		return true;

	}

}

用于測试ajax的a.jsp文件

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'a.jsp' starting page</title>

	<meta http-equiv="pragma" content="no-cache">

	<meta http-equiv="cache-control" content="no-cache">

	<meta http-equiv="expires" content="0">

	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

	<meta http-equiv="description" content="This is my page">

	<!--

	<link rel="stylesheet" type="text/css" href="styles.css">

	-->

	<script>

		function createAjaxObj(){

			var req ;

			if(window.XMLHttpRequest){

				req = new XMLHttpRequest() ;

			}else{

				req = new ActiveXObject("Msxml2.XMLHTTP") ;

			}

			return req ;

		}

		function sendAjaxReq(){

			var req = createAjaxObj() ;

			req.open("get","myajax.do?method=test2&uname=张三") ;

			req.setRequestHeader("accept","application/json") ;

			req.onreadystatechange = function(){

				var msg = req.responseText ;

				eval("var result=" + msg) ;

				document.getElementById("div1").innerHTML = result[0].name ;

			}

			req.send(null) ;

		}

	</script>

  </head>

  <body>

    <a href="javascript:void(0);" onclick="sendAjaxReq();">測试</a>

    <div id="div1"></div>

  </body>

</html>

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>

	<meta http-equiv="pragma" content="no-cache">

	<meta http-equiv="cache-control" content="no-cache">

	<meta http-equiv="expires" content="0">

	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

	<meta http-equiv="description" content="This is my page">

	<!--

	<link rel="stylesheet" type="text/css" href="styles.css">

	-->

  </head>

  <body>

  	${requestScope.uname} <br />

  	${sessionScope.uname} <br />

  </body>

</html>

index2.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'index2.jsp' starting page</title>

	<meta http-equiv="pragma" content="no-cache">

	<meta http-equiv="cache-control" content="no-cache">

	<meta http-equiv="expires" content="0">

	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

	<meta http-equiv="description" content="This is my page">

	<!--

	<link rel="stylesheet" type="text/css" href="styles.css">

	-->

  </head>

  <body>

    <form action="user.do">

    	姓名：<input type="text" name="uname"/><br />

    	<input type="hidden" name="method" value="reg3">

    	<input type="submit" value="注冊 " />

    </form>

  </body>

</html>

upload_error.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'upload_error.jsp' starting page</title>

	<meta http-equiv="pragma" content="no-cache">

	<meta http-equiv="cache-control" content="no-cache">

	<meta http-equiv="expires" content="0">

	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

	<meta http-equiv="description" content="This is my page">

	<!--

	<link rel="stylesheet" type="text/css" href="styles.css">

	-->

  </head>

  <body>

    	<h1>上传失败！</h1>

  </body>

</html>

upload_ok.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'upload_ok.jsp' starting page</title>

	<meta http-equiv="pragma" content="no-cache">

	<meta http-equiv="cache-control" content="no-cache">

	<meta http-equiv="expires" content="0">

	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

	<meta http-equiv="description" content="This is my page">

	<!--

	<link rel="stylesheet" type="text/css" href="styles.css">

	-->

  </head>

  <body>

    	<h1>上传成功！

</h1>

  </body>

</html>

upload.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>測试springmvc中的上传的实现</title>

	<meta http-equiv="pragma" content="no-cache">

	<meta http-equiv="cache-control" content="no-cache">

	<meta http-equiv="expires" content="0">

	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

	<meta http-equiv="description" content="This is my page">

	<!--

	<link rel="stylesheet" type="text/css" href="styles.css">

	-->

  </head>

  <body>

    <form action="upload.do" method="post" enctype="multipart/form-data">

    	<input type="text" name="name" />

    	<input type="file" name="file" />

    	<input type="submit" />

    </form>

  </body>

</html>

至此整个springmvc重要的东西測试完成！

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